Try this... first wash it thoroughly. At least wipe it clean with hot water and a rag to dry. Then, if you know where the rubs are, use a blade or sandpaper to get rid of the rubs (may have to unscrew or pop pins here). Then when done, prime it up. Then re-check for rubs. If they are still there to a lesser degree or new ones are found, fix em until they are gone. Then, re-prime those spots and let fully dry. Then paint away.

YOu need to "prep" the surface for paint so that the pait has something to bite into what you need to do is scuff the surface with some really fine sand paper like 600 or 800 then shoot your base let it flash dry then shoot your clear